- Sold out
JJ Engine Parts
Caterpillar C7 ACERT OEM Diesel Engine Fuel Injector 241-3238
$200.00Unit price /Unavailable JJ Engine Parts
Mack MP7 OEM Diesel Engine Control Module ECM ECU 21358126 EPA10
$2,000.00Unit price /UnavailableJJ Engine Parts
Cummins ISL OEM Diesel Engine Control Module ECM ECU CM850 4921776 4921797
$750.00Unit price /UnavailableJJ Engine Parts
Paccar MX-13 OEM Diesel Engine Control Module ECM ECU 2160700 2037394 2298833 2295122
$2,000.00Unit price /UnavailableJJ Engine Parts
$1,000.00Unit price /Unavailable- Sold out
JJ Engine Parts
Transtron OEM Control Module ECM for Isuzu 4JJ1 Engine 8983627510 8983621790
$2,000.00Unit price /Unavailable JJ Engine Parts
Cummins ISL9 OEM Diesel Engine Control Module ECM ECU CM2350 5290170 5290171 5297107 5317106
$1,000.00Unit price /UnavailableJJ Engine Parts
Mack AC OEM Diesel Engine Control Module ECM ECU 12MS532M 0281020045
$1,200.00Unit price /UnavailableJJ Engine Parts
Cummins ISX OEM Diesel Engine Control Module ECM ECU 3683289 3684009 3684008
$750.00Unit price /UnavailableJJ Engine Parts
Paccar MX-13 OEM Diesel Engine Control Module ECM ECU 2300479 2302109 705300AT
$2,000.00Unit price /Unavailable- Sold out
JJ Engine Parts
Paccar MX-13 OEM Diesel Engine Control Module ECM ECU 2302109 2300479 705300AT
$2,000.00Unit price /Unavailable JJ Engine Parts
Paccar MX-13 OEM Diesel Engine Control Module ECM ECU 2037394 2298833 2160700 2295122
$2,000.00Unit price /UnavailableJJ Engine Parts
Paccar MX-13 OEM Diesel Engine Control Module ECM ECU 2037394 2298833 2160700 2295122
$2,000.00Unit price /UnavailableJJ Engine Parts
Paccar MX-13 OEM Diesel Engine Control Module ECM ECU 2037394 2298833 2160700 2295122
$2,000.00Unit price /UnavailableJJ Engine Parts
Paccar MX-13 OEM Diesel Engine Control Module ECM ECU 2037394 2298833 2160700 2295122
$2,000.00Unit price /UnavailableJJ Engine Parts
Paccar MX-13 OEM Diesel Engine Control Module ECM ECU 2037394 2298833 2160700 2295122
$2,000.00Unit price /UnavailableJJ Engine Parts
Paccar MX-13 OEM Diesel Engine Control Module ECM ECU 2037394 2298833 2160700 2295122
$2,000.00Unit price /UnavailableJJ Engine Parts
Paccar MX-13 OEM Diesel Engine Control Module ECM ECU 2037394 2298833 2160700 2295122
$2,000.00Unit price /Unavailable

Used Diesel Engine Parts for Trucks & Fleet Repairs
JJ Engine Parts supports fleet operators, repair shops, and independent diesel mechanics who need dependable used diesel engine parts. Whether you are sourcing Cummins or Detroit engine parts, or supporting other diesel platforms, selecting the correct component is critical.
That’s why we focus on parts that match OEM specifications and real-world applications. Our inventory is structured to help customers quickly find the right solution for rebuilds, replacements, and legacy engine repairs.
Used Engine Components Available
Our collection includes used truck engine parts for sale that are commonly required in diesel repair and maintenance. Availability changes based on inventory, but supported components often include:
- Used ECM ECU for sale (OEM and inspected used options)
- Used turbochargers for sale
- Cooling system components
- Affordable used engine parts for budget-conscious repairs
- Used OEM components for major diesel platforms, including Detroit and Cummins engine parts
Each listing is reviewed for compatibility with specific engine models whenever possible and verified prior to shipment.

Nationwide Shipping & Fitment Assistance at JJ Engine Parts
We ship used diesel engine parts across the United States, depending on part size and destination. JJ Engine Parts regularly supports major diesel platforms, including Cummins, Detroit Diesel, Caterpillar, Volvo, and PACCAR engines. Browse our selection of used engine parts, or contact our team to help you source the right component for your diesel truck.
Frequently Asked Questions About Used Engine Parts
How do I find the correct used engine part?
How do I find the correct used engine part?
Fitment depends on your engine model and serial number. Contact us for assistance before ordering.
Are used ECM or ECU units available?
Are used ECM or ECU units available?
Yes. Used ECM ECU units are available in OEM and inspected options when in stock.
Do you sell used turbochargers?
Do you sell used turbochargers?
Yes. Used turbochargers are offered based on availability.
Are used OEM engine components reliable?
Are used OEM engine components reliable?
When properly inspected and matched to the correct engine, used OEM components can provide dependable performance.
Do you ship used truck engine parts nationwide?
Do you ship used truck engine parts nationwide?
Yes, we ship used engine parts across the United States, depending on part size and destination.